Polycom MGC Administrator, Administrator'S Manual

Page: 108 / 584

Chapter 3 - Defining Network Services
3-58
Protocol Select:
• H.323: For an H.323-only Network Service. Only
H.323 participants can connect to the MCU using
this service.
• SIP: For a SIP-only Network Service. Only SIP
participants can connect to the MCU using this
service.
• Both: For an integrated IP Service. Both H.323
and SIP participants can connect to the MCU
using this service.
Network
DHCP-Obtain IP
Address
Automatically Select this check box to use a DHCP server for
automatic assignment and tracking of IP addresses
to the conference devices (for a definition of DHCP,
see “DHCP” on page E-3). Selecting this option
retrieves the IP addresses necessary for registration
with the DNS and H.323 gatekeeper, and for
automatic configuration of the SIP server. This option
is useful when your network includes many
components whose IP addresses have to be defined.
When this option is selected, each IP card is
assigned an IP address for the session by the DHCP.
With this assigned IP address, the IP card registers
with the gatekeeper using its alias and the IP address
received from the DHCP. Usually, the DHCP will
recognize the MAC address of the IP card and will try
to assign the same IP address to the card (unless the
card was inactive for several days.) It is
recommended to use this option if you have several
IP cards to configure as this automatic configuration
minimizes the probability of configuration errors.
When the DHCP server is used, the IP address of the
card appears as 0.0.0.0.
Table 3-15: Settings Dialog Box Options
Field Description